434 



PRACTICAL ANATOMY, 



On the posterior surface are the three extensors of the thumb, and the posterior 

 interosseous nerve and vessels. An upper strong band of this membrane is called 

 the oblique ligament. (Fig. 303.) 



Oblique 



ligament 



Upper edge 



ol inter- 



osseous 



membrane 



FIG. 303. INTERNAL VIEW OF THE ELBOW-JOINT. 



Anterior radio-ulnar 



ligament 



Internal lateral liga- 

 ment of wrist 

 Flexor carpi ulnaris 



External lateral ligament 



of wrist 

 Anterior radio-carpal 



ligament 

 Tendon of flexor carpi 



radial IB 



Capsular ligament of first 

 carpo-metacarpal joint 



FIG. 304. ANTERIOR VIEW OF WRIST. 



THE INFERIOR RADIO-ULNAR ARTICULATION. 



1. Class. Diarthrosis, because of free motion and a capsule. 



2. Subdivision. Ginglymus, because of motion in two directions only. 



3. Technical Name. Inferior radio-ulnar articulation ; common, none. 



4. Osteological Units. Radius and ulna. 



5. Subdivisional Parts. Head of ulna, sigmoid of radius. (Fig. 246.) 



